#coding=utf-8
import random,os
import base64,requests
import logging

USER_AGENTS = [
    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; AcooBrowser; .NET CLR 1.1.4322; .NET CLR 2.0.50727)",
    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Acoo Browser; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506)",
    "Mozilla/4.0 (compatible; MSIE 7.0; AOL 9.5; AOLBuild 4337.35; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)",
    "Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US)",
    "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)",
    "Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 1.0.3705; .NET CLR 1.1.4322)",
    "Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.0.04506.30)",
    "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN) AppleWebKit/523.15 (KHTML, like Gecko, Safari/419.3) Arora/0.3 (Change: 287 c9dfb30)",
    "Mozilla/5.0 (X11; U; Linux; en-US) AppleWebKit/527+ (KHTML, like Gecko, Safari/419.3) Arora/0.6",
    "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2pre) Gecko/20070215 K-Ninja/2.1.1",
    "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9) Gecko/20080705 Firefox/3.0 Kapiko/3.0",
    "Mozilla/5.0 (X11; Linux i686; U;) Gecko/20070322 Kazehakase/0.4.5",
    "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.8) Gecko Fedora/1.9.0.8-1.fc10 Kazehakase/0.5.6",
    "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11",
    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/535.20 (KHTML, like Gecko) Chrome/19.0.1036.7 Safari/535.20",
    "Opera/9.80 (Macintosh; Intel Mac OS X 10.6.8; U; fr) Presto/2.9.168 Version/11.52",
]


class RandomUserAgent(object):
    """Randomly rotate user agents based on a list of predefined ones"""
    def process_request(self, request, spider):
        curagent = random.choice(USER_AGENTS)
        #print request.headers
        request.headers['User-Agent'] = curagent
        #print request.headers

basedir = os.path.dirname(os.path.dirname(__file__))

def get_ip_ports():
    print "load proxy enter"
    with open(basedir+'/productinfo/res/proxy.txt') as f:
        line, data = f.readline(), []
        while line:
            print line
            if line.startswith(' ') or line.startswith('\n') or not line.split():
                pass
            else:
                str = line.split(" ")
                data.append(str[0]+":"+str[1])
            line = f.readline()
    print "%d proxys loaded" %len(data)
    return data

PROXIES = get_ip_ports()

class ProxyMiddleware(object):
    def process_request(self, request, spider):
        proxy = random.choice(PROXIES)
        request.meta['proxy'] = "http://%s" %proxy
        print proxy

class Referer(object):
    def process_request(self, request, spider):
        #print request.headers
        request.headers.setdefault('Referer', "http://www.anccnet.com/")
        #request.headers['Referer'] = "http://www.anccnet.com/2222"
        #print request.headers
        #print "**************Referer1 have pass************"

ferr = open("errid.txt",'w')
class RequestExceptionMiddlewares(object):
    def __init__(self):
        self.logger = logging.getLogger('RequestExceptionMiddlewares')
    #当下载处理器(download handler)或 process_request() 
    #(下载中间件)抛出异常(包括 IgnoreRequest 异常)时， Scrapy调用 process_exception() 。
    def process_exception(self, request, exception, spider):
        try:
            ferr.write(str(request.url).split("=")[1]+"\n")
            print "error:" + request.url 
        except:
            pass

    def process_response(self, request, response, spider):
        #self.logger.error("request status:%d: %s" %(response.status, response.url))
        print request.url
        return response


class ResponseExceptionMiddlewares(object):
    def __init__(self):
        self.logger = logging.getLogger('ExceptionMiddlewares')

    #当response通过spider中间件时，该方法被调用，处理该response。
    def process_spider_input(self, response, spider):
        #if response.status > 0 :
        #    self.logger.error(response.url)
        pass
        

    #当Spider处理response返回result时，该方法被调用。
    def process_spider_output(self, response, result, spider):
        pass

    #当spider或(其他spider中间件的) process_spider_input() 跑出异常时， 该方法被调用。
    def process_spider_exception(self, response, exception, spider):
        #self.logger.error(response.url)
        pass